Die-casting apparatus



Jan. M, 11923. 1,442,479

J. KRALUND ET AL. DIE CASTING APPARATUS.

FILED MAY 8, 1920.

Patented Jan. l6, l923.

entree wa I.

J Oil-IN KRALUND AND CLARENCE DUCKWORTH, OF BROOKLYN, NEVJ YORK, ASSIGNORS TO DOEHLER DIE CASTING COMPANY, OF BROOKLYN", NEV] YORK, A CORPORATION OF NEW YORK.

DIE-CASTING:- APPARATUS.

Application filed ma 8',

T all whom it may c oncern:

Be it known that we, JOHN KR LUND and CLARENCE H. DUoKwonrH, both citizens of the United States, and both residing in the borough of Brooklyn, in the city of Newv York, county of Kings, and State of New York, have invented certain new and useful 1 from a melting pot to a suitable die or mold immersed in the molten metal so that a en charge of the same runs into its interior, after which the carrier 13 moved to cause its mouth to align accurately with the gate or opening of the die.. As soon as this is accomplished compressed air or other suitable gas is forced through the carrier to deliver the charge of metal into the die.

In PatentNo. 1,299,738, granted April 8,. 1919, to John Kralund, a carrier or ladle is made use of which has a swinging movement and also moves bodily, laterally of the melting pot, to take the. charge of molten metal and deliver the same to the gate opening of the die.- Accord'mg to our present invention the carrier does not have a swinging movement. Broadly speaking we provide means for causingf-i'relativebodily movement between the carrier device and melting pot, in a vertical udirectiomito submerge the mouth of the carrier deviceein the molten metal 40 and to uncover the'same', and mechanism for causing relative bodily movement between the melting pot and the carrier device in a horizontal direction to place the mouth of the carrier device in delivery position and to return the same into position to be submerged within the molten metal.

In our preferred construction the melting pot itself is vertically movable so that in the operation of the device the melting pot to is first raised to immerse the mouth piece of the carrier beneath the surface of the molten metal .so that the charge will flow into the interior of the carrier. The melting pot is I one embodiment of our invention.

1920. Serial No. 379,711.

then lowered, after which the carrier is movedhorizontally into registration with the die, whereupon pressure is applied to force the charge into the die, and the carrier moved back to its former position, after which the cycle of operations is repeated for each casting. ee

1 .The object of our invention is to provide 'efi ective devices of the character described. The carrier may be caused to run on horizontal tracks, being operated by a hand lever or similanmeans, with which a toggle joint may efiectively be used to lock the carrier in the positlon-in which it delivers the charge into the gate opening of the die. The melting pot may readily be raised and lowered by means of a hand lever'or the like with which a toggle joint may effectively be used to lock the melting pot. in its raised position in which the charge is taken into the carrier through the mouth piece. I

In order that our invention may be more clearly understood attention is hereby directed to the accompanying drawings forming part of this application and illustrating In the drawings Fig. 1 represents a view partly in side elevation and partly in section of a form of apparatus embodying our invention and Fig. 2 represents a top plan view of the same.

Referring to the drawings the melting pot l is adapted to contain a substantialbody of molten metal and is heatedby any usual heating meansfnotshown) in the heating chamber 2. The melting pot is supported by a vertical plunger 3 which is mounted to slidably extend through an opening in the bottom of the heating chamber 2. The plunger 3 is supported from a pair of toggle links 1- and 5, the latter of which is secured at its lower end to a shaft 6 mounted in a support 7 which may rest on the floor. The heating chamber 2 may be supported by any suitable means; which I have not deemed it necessary to show.

The melting pot is provided with pins 8, 8, which are slidably mounted in guideways 9 which are formed on the inner side surface of the heating chamber 2 so as to insure a straight line rise and fall of the melting pot. A hand lever 10.is secured to shaft 6 so that by the operation of the same the toggle links 4 and 5 willbe straightened to raise the melting pot, and will be broken to lower the melting pot. \Vhen the melting pot is in its raised position, the links 4 and 5 will be in vertical alignment with each other so as to hold or lock the melting pot in its raised position until the toggle is broken by swinging the hand lever 10.:

The carrier device 11 is preferably of the goose-neck shape indicated and is provided on its forward end with a mouth or nozzle 12. The interior of the device is hollow and adapted to contain a suitable charge of molten metal. A pipe connection 13 leads into the closed rear end of the device for the purpose of carrying compressed air or other gas, when the air connection is open, forforcing the charge of molten metal in the carrier device out from the nozzle 12.

We have indicated at 14 a frame for carrying the die, this ,frame having an end plate 15 through which extends a horizontal opening provided with a bushing the end of which is indicated at 16. The forward half of the die is adapted to be mounted against the plate 15 with the opening in which bushing 16 is mounted communicating with the interior of the die and forming a gate opening therefor. In operation, the frame 14 is so positioned that end plate 15 will be closely adjacent to the heating chamber 2 with the end of the gate bushing 16 extending over the adjacent edge of the heating chamber 2.

In the construction shown the carrier device 11 is rovided with rollers 17 which are adapte to roll on horizontal tracks 18 formed on the upper side edges of the heating chamber 2. Rollers 17 may be mounted on horizontal shafts or studs carried by the horizontal extensions 19, 19 at the front and rear of the carrier device. WVith the carrier device so mounted its nozzle or mouth 12 Will be in horizontal alignment with the bushing 16 formed in the plate 15.

The carrier device is provided at the rear with a bracket or extension 20. The heating chamber 2 is provided at the rear with a bracket 21 which carries a horizontal shaft 22, which may be oscillated by means of the hand lever 23. Shaft 22 is connected to the rear extension 20 of the carrier device by a pair of toggle links 24, 25. The operation of the handle 23 serves to straighten the toggle 24, 25, to force the delivery nozzle 12 into the' gate opening in plate 15, and, on the opposite movement, to break the toggle and move the carrier device back into position in which nozzle 12 may be submerged within the molten metal in the melting pot.

The operation of our device will now be clear. The melting pot being in its raised position, a charge of molten metal will have entered the carrier device through the nozzle 12. Lever 10 is now thrown over to lower the melting pot so that nozzle 12 is uncovered by the molten metal, the upper edge of the melting pot dropping to a position slightly below the gate opening in plate 15. Hand lever 23 is now depressed to straighten toggles 24. 25, and move the carrier device into its delivery position 111 which nozzle 12 is firmly inserted within the mouth of bushing 16-. The carrier device is locked in this position by the straightenlng of toggle links 24 and 25. The air pressure is then turned on in pipe connection 13 whereupon the charge in the carrier device will be forced through the bushing 16 into the die. Lever 23 is then raised to move the carrier device back to its normal position, a stop being provided by the flange 261011 the rearward extension 20 of the carrier device. this flange 26 contacting against the link 24 at the limit of movement of the carrier device to the right. referring to Fig. 1. 'Hand lever 10 is then swung into the vertical position to raise the melting pot so as to submerge nozzle 12 within the molten metal. the cycle of operations being repeated indefinitely.

It will be understood that our invention is not limited strictly to the details of construction described but is as broad as is indicated by the accompanying claims.

lVhat we claim is 1. In casting apparatus. the combination of a molten metal container. a carrier device, having a delivery nozzle and a compressed gas connection, means for raising said container to submerge said nozzle in the molten metal, and for lowering the same. and means for moving said carrier device across said container, to and from position for delivering its charge of molten metal to a die.-

2. Ina casting apparatus, .the combination of a molten metal container. a carrier device, adaptedto deliver molten metal to a die and having an opening therein and a pressure connection. means for raising and lowering said container to submerge said opening in the molten metal and to bring the same above the surface thereof, and means for moving said carrier device across said container, to and from position for delivering its charge of molten metal to a die.

said mouth in position to deliver its charge of molten metal to a die, and to place the same in position to be submerged within the molten metal, respectively.

4. In casing apparatus, the combination of a molten metal container, a carrier device having a mouth and a pressure connection, means for moving said device to and from position to deliver a charge of metal to a die, and means for raising and lowering said container, to submerge and uncover said mouth, comprising a lever and toggle joint.

5. In casting apparatus, in combination, a carrier device having a mouth and a pressure connection, a heating chamber. having vertical guideways therein, a molten metal container mounted therein, having projections slidably mounted in said guideways, a plunger supporting said container. extending out through the bottom of said chamber, means for raising and lowering said plunger to raise and lower said container with respect to said carrier device,and means for moving said carrier device ivith respect to said container to and from position to deliver the charge of metal to a die.

6. In casting apparatus, the combination of a support, tracks thereon, a carrier device having a nozzle, a pressure connection, and supporting means mounted on said tracks, means for reciprocating said device upon said tracks comprising a shaft. means for oscillating the same and a toggle joint between said shaft and de ice. and a molten metal container so mounted in relation to said carrier device as to enable said nozzle to be submerged within and uncovered by the molten metal in said container.

7. In casting apparatus. the combination of a support, a molten metal container. a carrier device having a nozzle and a pressure connection. a track for movably supporting said device. means for causing said nozzle to be submerged \vithin molten metal in said container and uncovered thereby. and means for moving said device forward and back across said container and locking it in forward position, consisting in a shaft mounted in said support. links pivotally connected to each other and to said device and shaft to constitute a toggle and means for straightening out and opening, up the links constituting the toggle- This specification signed and witnessed this etth day of May. 1920.

JOHN KRALUN D. CLARENCE H. DUClUVUR'll-l.

Witnesses YVILLIAM R. ALERBERG, WILLIAM E. BAUERSCHMIDT. 

